List of the Top 25 Anti-Phishing Software for Microsoft 365 in 2026

Adaptive Security was founded in 2024 by seasoned entrepreneurs Brian Long and Andrew Jones. Since inception, the company has raised over $50 million from top-tier investors including OpenAI, Andreessen Horowitz, and executives from Google Cloud, Fidelity, Plaid, Shopify, and other industry leaders. Adaptive defends organizations against sophisticated, AI-driven cyber threats such as deepfakes, vishing, smishing, and spear phishing. Its next-generation security awareness training and AI phishing simulation platform enables security teams to deliver ultra-personalized training that adapts to each employee’s role, access level, and exposure. This training leverages real-time open-source intelligence (OSINT) and features highly convincing deepfake content—including synthetic media of a company’s own executives—to mirror real-world attack vectors. Through AI-powered simulations, customers can continuously assess and improve organizational resilience. Hyper-realistic phishing tests across voice, SMS, email, and video channels evaluate risk across every major vector. These simulations are fueled by Adaptive’s AI OSINT engine, giving teams deep visibility into how attackers might exploit their digital footprint. Today, Adaptive serves global leaders like Figma, The Dallas Mavericks, BMC Software, and Stone Point Capital. With an industry-leading Net Promoter Score of 94, Adaptive is redefining excellence in cybersecurity.

Guardz is the unified cybersecurity platform built for MSPs. We consolidate the essential security controls, including identities, endpoints, email, awareness, and more, into one AI-native framework designed for operational efficiency. With an identity-centric approach, an elite threat hunting team, and 24/7 AI + human-led MDR, Guardz transforms cybersecurity from reactive defense into proactive protection.

SpamTitan's email security solution safeguards businesses, educational institutions, small to medium-sized enterprises (SMBs), and managed service providers (MSPs) from various email threats including spam. It effectively defends against phishing attempts, zero-day vulnerabilities, viruses, malware, ransomware, and other malicious email activities, ensuring a secure mail flow and filtering out unwanted messages. Our user-friendly yet robust email protection is compatible with Office365, making it accessible for a wide range of users. You can try SpamTitan Email Security risk-free with a fully supported trial. SpamTitan – Comprehensive features included: * Protection against CEO impersonation * Safeguarding against spear phishing attacks * Analysis of links within emails * Complete email sanitization * Defense against zero-day attacks * Mail spooling capabilities * Anti-spoofing measures * Protection against ransomware and malware * Checking for SPF, DKIM, and DMARC compliance * Encryption options available * Fully multi-tenant architecture * Customizable user interface for branding * Complete REST API access * Detailed setup documentation and support Recognized as a top solution in the G2 Crowd Email Security category, SpamTitan Email Security stands out for its premium functionalities and reliability. Begin your free trial today and enhance your email security!

WebTitan serves as a DNS-based web content filtering system and security layer designed to defend against cyber threats, including malware, ransomware, and phishing attacks, while also offering detailed control over web content. The WebTitan Cloud for Wi-Fi is specifically tailored for cloud-based content filtering in Wi-Fi settings, addressing the risk of guests encountering inappropriate websites and harmful malware. This solution enables you to manage the type of content accessible to users, fostering a secure internet browsing environment while generating reports on network activity for your organization. Powered by an advanced AI-driven real-time content categorization engine, WebTitan combines top-notch antivirus capabilities with cloud infrastructure, making it a perfect fit for organizations seeking robust protection with minimal upkeep. Furthermore, WebTitan Cloud is designed to be low maintenance and can be implemented in just five minutes, effectively preventing users from accessing undesirable online content. Take advantage of WebTitan's free trial today, complete with full support to help you get started seamlessly.

PreVeil transforms the landscape of end-to-end encryption by providing exceptional security for organizations' emails and files, shielding them from various threats such as phishing, spoofing, and business email compromise. The platform prioritizes user-friendliness, making it accessible for employees while remaining simple for administrators to manage. By implementing PreVeil, companies can utilize a secure and easy-to-navigate encrypted email and cloud storage solution that protects vital communications and documents effectively. With its advanced end-to-end encryption, PreVeil guarantees that data is safeguarded at every stage of its lifecycle. Moreover, the platform includes a feature known as the “Trusted Community,” which promotes secure interactions among employees, contractors, vendors, and other external entities. This groundbreaking addition enables users to exchange sensitive materials with confidence, assured that they are shielded from prevalent cyber threats. Ultimately, PreVeil not only enhances security for organizations but also cultivates a cooperative atmosphere that encourages teamwork and collaboration among its users. By prioritizing both safety and usability, PreVeil addresses the evolving needs of modern businesses.

Introducing PhishTitan, a cutting-edge inline phishing protection and remediation solution designed for Microsoft 365, leveraging advanced AI technology to combat phishing threats effectively. Developed by TitanHQ, a leader in email cybersecurity, PhishTitan specifically addresses the sophisticated phishing and business email compromise (BEC) attacks that Microsoft may overlook. It equips users with real-time warning banners, enabling them to assess the safety of incoming emails and bolstering their ability to act as a human firewall. One of its standout features is post delivery remediation (PDR), which enables the removal of phishing emails from users' inboxes, thus mitigating risk immediately; these threats are then redirected to the junk folder for added security. The email threat intelligence data provided by PhishTitan is exceptional in its clarity, visibility, extensive coverage, and precision, ensuring that users are always informed about potential risks. With a remarkably simple deployment process taking just six minutes, PhishTitan effectively filters your email to detect and neutralize phishing threats, safeguarding both your users and business. This swift implementation is crucial in preventing that single erroneous click that could lead to a significant security breach, illustrating how PhishTitan can be a game-changer for organizations. By choosing PhishTitan, you’re not just enhancing your email security; you’re empowering your team to navigate the digital landscape with confidence.

Strengthening the protection of your email accounts is vital, as email continues to be the main conduit for various threats. It is important to expand your security strategies to detect dangerous threats proactively and to effectively respond to and manage emerging risks as they occur. Understanding the malicious strategies that can target your organization is crucial for prevention. By identifying the specific vulnerabilities your business faces and categorizing the threats, you can gain a clearer picture of which areas are most at risk of an attack. Employing AI-driven threat detection allows multiple systems to simultaneously scrutinize various elements of incoming emails. The data collected from these analyses ensures accurate threat identification, evaluates potential business risks, and aids in formulating appropriate response plans. Cyber threats can come from numerous sources, such as phishing attacks, business email compromises, malware infections, and ransomware invasions. Safeguard your organization against all these dangers by leveraging advanced threat intelligence, which empowers you to act swiftly against any emerging risks. Given the constant evolution of cyber threats, it is essential to stay one step ahead of potential attackers by adopting robust and comprehensive security solutions that evolve alongside the threat landscape. Additionally, regular training and awareness for employees can significantly bolster your defenses against these risks.

MDaemon Technologies has created the email threat detection technology utilized by Security Gateway. For over two decades, this trailblazer in the email industry has been safeguarding email servers from various dangers like viruses, spam, and phishing. Organizations rely on their expertise to maintain the security of their email exchanges. Their protection extends to all email platforms, such as Microsoft Exchange and Office 365, among others. With a dedicated team of email security experts, Security Gateway simplifies the management of your organization’s email security needs. Utilizing the latest advancements in email threat detection technology and policy enforcement tools, Security Gateway ensures that legitimate emails are efficiently delivered to and from your users. Additionally, the cloud service offered by Security Gateway is straightforward to implement, allowing you to concentrate on other vital responsibilities. To learn more about the functionalities of Security Gateway, be sure to check out this informative video.

Protect the integrity of Microsoft Office 365, Google G Suite, and in-house email systems by deploying the industry's most effective email security solutions. Safeguard users from various threats, including spear phishing, credential compromise, and ransomware, by implementing Email Threat Isolation techniques. Address common email vulnerabilities such as spear phishing, ransomware, business email compromise, and spam with strong protective measures. Thwart spear phishing attempts through a layered defense system that includes threat isolation, spam filtering, advanced analytics, and user training initiatives. Shield against the latest ransomware threats by utilizing sophisticated content defense methods, sandboxing, and link protection technologies designed to detect new and hidden threats, including zero-day exploits. Counteract business email compromise by using impersonation safeguards, enforcing sender authentication, and applying brand protection tactics. Improve your brand's reputation and reduce risks by automating the enforcement of sender authentication methods like DMARC, DKIM, and SPF with Symantec Email Fraud Protection, which effectively tackles the challenges associated with email security. By adopting these comprehensive strategies, organizations not only protect their communications but also cultivate a security-conscious culture among their users, ultimately enhancing overall organizational resilience against email-based threats. Investing in these solutions is crucial for maintaining secure and trustworthy communication channels.

PhishingBox is an effective tool for clients aiming to minimize risks and achieve their cybersecurity objectives. Its user-friendly interface and affordability make it an attractive option. Through an automated process, clients can address the critical issue of phishing effectively. The system conducts comprehensive scans to identify vulnerabilities across various networks, systems, and applications. Additionally, our phishing assessments for employees play a vital role in enhancing awareness of security threats that may jeopardize the organization. By implementing PhishingBox, companies can strengthen their overall security posture and protect valuable assets.

Guardian Digital offers robust protection against various email threats, including phishing scams, zero-day vulnerabilities, and debilitating ransomware assaults. These dangers represent just a fraction of the numerous risks that email users encounter daily. Given that over 90% of cyber attacks begin with an email, securing email is fundamentally a matter of business security. An effective, purpose-driven solution is essential for safeguarding email communications. It effectively addresses significant security vulnerabilities found in platforms like Microsoft 365 and Google Workspace. In addition, it offers remote assistance, expert installation, and continuous management from a distance. Furthermore, we deliver real-time insights into cybersecurity for businesses, enabling you to evaluate your existing risk profile and bolster your defenses against the pervasive threats that all organizations face through email interactions. Ultimately, our comprehensive approach ensures that your email security is not only reactive but also proactive in minimizing potential threats.

PhishEye is a powerful digital risk protection platform tailored to help teams tackle security challenges, prevent fraud, and manage brand integrity by identifying and eliminating phishing sites, lookalike domains, impersonation threats, and brand misuse. It combines AI-enhanced phishing detection with extensive monitoring of typosquatting and domain threats across various platforms such as the web, advertisements, social media, and search engines, converting alerts into prioritized action items supported by substantial evidence and tracked takedown outcomes from registrars, hosting providers, and online platforms. Created by experts who have direct insight into the challenges faced by abuse desks, PhishEye prioritizes the use of stable identifiers and compelling harm narratives, ensuring that the effectiveness of follow-up actions is maintained despite any changes in the underlying infrastructure. The platform fundamentally adopts a software-first approach, while also providing optional managed support to address scenarios that require additional resources or coverage, thereby enhancing its adaptability and efficacy in countering digital risks. In this manner, PhishEye delivers not only immediate solutions to current threats but also promotes sustained resilience against potential future dangers, equipping organizations with the necessary tools to safeguard their digital presence effectively. Moreover, the continuous evolution of its features ensures that users remain ahead of emerging threats in an ever-changing digital landscape.

Make a wise investment today to bolster your defenses against email security threats by acquiring a robust email security solution tailored for small businesses at affordable rates. Cybercriminals are increasingly targeting high-level executives like CEOs and CFOs across various sectors, alongside crucial departments such as HR and Accounting. While Office 365 offers some level of protection, its capabilities are insufficient to effectively combat impersonations, email fraud, and phishing attacks. Relying solely on custom transport rules to block domains and guard against employee impersonations can leave significant gaps in security. PhishProtection stands out as it is compatible with all email servers, devices, and SMTP services, ensuring comprehensive protection regardless of your location or the email client you use. Whether you access your emails through your phone, Outlook, or other platforms, this solution offers top-notch security for both Android and iOS devices, making it a critical investment for safeguarding your business communications. In today’s evolving cyber landscape, prioritizing email security is not just smart; it's essential for every small business.

An additional layer of security has been established to block potential threats from infiltrating users within the network. This system is meticulously crafted to protect email communications, which are frequently the most vulnerable to cyberattacks. ESET proudly offers a true 64-bit product that accommodates clustering, ensuring that organizational speed remains efficient regardless of size. ESET Mail Security solutions incorporate a unique blend of anti-spam, anti-phishing, and host server protection, utilizing machine learning, comprehensive data analysis, and expert insights within an award-winning mail security framework. This advanced functionality significantly diminishes both unsolicited emails and targeted threats, allowing employees to focus on their tasks while maintaining uninterrupted business operations. Users are often confronted with phishing attempts that can carry additional malicious components, highlighting the necessity for a cohesive email security strategy. Depending on individual users to identify genuine emails can be an inefficient method, as they may quickly become overwhelmed by this responsibility. To ease this challenge, users are automatically alerted about spam emails that are quarantined, thereby improving their capability to manage their inboxes with greater efficiency. Furthermore, these notifications ensure that legitimate communications are not overlooked amidst the clutter of spam.

Cloud-based applications such as email services, collaboration platforms, and storage options necessitate proactive security strategies. A comprehensive set of safeguards, including spam filtering, anti-malware measures, anti-phishing tactics, and advanced threat protection, serves as an essential barrier against cyber threats. By enhancing your Microsoft 365 services—like Exchange Online, OneDrive, Teams, and SharePoint Online—with an extra layer of advanced security, you can effectively block unwanted emails, prevent targeted attacks, and reduce the risk of ransomware, which allows staff to focus on their primary duties and promotes smooth business workflows. Furthermore, users will receive real-time updates via a dedicated console or alert system, ensuring they remain well-informed at all times. New users also benefit from automatic security measures, offering a complete defense against malware, spam, and phishing threats, complemented by state-of-the-art zero-day defense features and an intuitive cloud management interface. This advanced, award-winning filtering engine enhances performance and efficiently eliminates spam, keeping inboxes clear of unsolicited messages while protecting confidential data. Overall, this approach guarantees that the organization can navigate a digitally evolving landscape filled with various threats securely and effectively. Additionally, continuous updates and improvements to the security systems will further bolster defenses against emerging cyber risks.

Raptor Email Security is an MX-based system crafted by specialists to effectively block spam, phishing attempts, and malware threats, employing an innovative scoring system along with various technologies like ClamAV, MIMEDefang, and Sendmail. Our dedicated team of spam experts guarantees a spam-free experience, resulting in zero spam and zero support tickets while doubling your resources. By routing your emails through our servers, your system gains robust protection against most cyber threats, allowing you to expand your hosting revenue by adding additional accounts and optimizing resource use. Enhanced by Raptor Review, our service offers a thorough evaluation of your email setup, featuring a premium support line to address issues such as spam blocking, delivery enhancement, scam detection, and recovery of lost emails. Setting up Raptor Email Security is quick and easy, taking just a few minutes, and you can enjoy a complimentary 30-day trial to experience its benefits firsthand. With this solution, you can ensure that your email communication remains secure and efficient while gaining peace of mind.

ESET PROTECT Elite is an advanced cybersecurity solution tailored for enterprises, effectively merging extensive detection and response features with a solid multilayered defense architecture. By employing innovative methods such as adaptive scanning, machine learning, cloud sandboxing, and behavioral analysis, it proficiently tackles zero-day vulnerabilities and ransomware threats. This platform offers contemporary endpoint protection for both desktop and mobile devices, alongside server security that guarantees real-time safety of data and mobile threat defenses. Furthermore, it includes full disk encryption, assisting organizations in achieving compliance with data protection regulations. ESET PROTECT Elite also features robust email security capabilities, which provide protection against phishing, malware, and spam, while safeguarding cloud applications such as Microsoft 365 and Google Workspace. With its automated vulnerability management and patching abilities, the solution streamlines the detection and rectification of security weaknesses across all endpoints, encouraging a proactive stance towards cybersecurity. In conclusion, ESET PROTECT Elite stands out as a holistic solution that effectively meets the complex and ever-changing demands posed by contemporary cybersecurity threats, ensuring that organizations remain secure in a digital landscape fraught with risks.

To safeguard enterprises against phishing, malware, and account takeovers, advanced email security solutions are essential, as standard protections often fail to identify malicious emails. Since its inception in 2015, Avanan has transformed the landscape of email security, effectively addressing the limitations of traditional gateways that have struggled to adapt to the demands of cloud computing. With patented technology, Avanan offers comprehensive security for all collaboration applications and protects against threats such as ransomware, account hijacking, business email compromise, and supply chain assaults. Their innovative approach has resulted in a remarkable 99.2% reduction in phishing attacks that make it to users’ inboxes. Powered by True AI, which has been honed on vast datasets, Avanan is adept at thwarting even the most sophisticated phishing attempts before they can cause harm. By leveraging API integrations, machine learning, and AI, Avanan enhances cloud email security effectively. The company boasts a client base of over 5,000, with 60% being large enterprises, and has earned recognition as a leading Email Security Solution according to Gartner Peer Insights and G2. Furthermore, organizations that prioritize security must remain vigilant in fending off evolving threats in today's digital landscape.

Libraesva Email Security serves as a robust defense for your organization against both longstanding and new email threats, guaranteeing that only authentic communications are delivered. It provides superior email protection by integrating cloud email solutions with a secure email gateway, further augmented by Libraesva's unique Adaptive Trust Engine. This innovative engine leverages artificial intelligence to analyze typical behavioral trends within organizations and their members, continually assessing the reliability of business communications and proactively identifying any suspicious activities. In addition, Libraesva Email Security thoroughly inspects all incoming and outgoing messages, effectively detecting and neutralizing advanced malware, phishing schemes, business email compromises, spam, and a variety of other potential hazards. Its exclusive sandboxing technology neutralizes dangerous payloads and active content found in attachments, while its proactive URL analysis examines every link, ensuring users are protected from visiting malicious websites. This comprehensive approach not only safeguards your organization’s communications but also enhances overall cybersecurity resilience.

We enable you to engage in the aspects of security you enjoy, even without conscious effort. With our managed security service, we provide around-the-clock detection and response to threats. Our system promptly identifies and addresses attacks as they occur. You will receive tailored, data-driven recommendations that enhance your security posture. Enjoy a transparent approach to cybersecurity that eliminates the need for traditional MSSPs and internal analyst consoles, ensuring no hidden elements remain. There’s no more uncertainty; you have full visibility into our operations. You will have access to the same interface our analysts utilize, allowing you to observe how crucial decisions are made in real time. Witness the progress of investigations as they happen, and we promise to deliver clear, straightforward explanations whenever we identify a threat. You can monitor the actions of our analysts, even during active investigations. You also maintain the freedom to select your preferred security technology, which we will optimize for improved efficiency. Our resilience recommendations can lead to substantial enhancements in your security strategy. Our analysts provide precise, actionable suggestions grounded in the specifics of your environment and historical data trends. By working closely with you, we aim to foster a more secure future.

Protect your organization from phishing attacks and business email compromise (BEC) by implementing cutting-edge DMARC technology. Since its founding in 2015, Valimail has led the charge in identity-focused anti-phishing measures, helping to create a trustworthy framework for digital communications globally. Their all-encompassing, cloud-based platform is dedicated to validating and verifying sender identities, effectively preventing phishing efforts while bolstering brand reputation and ensuring adherence to regulations. By cultivating trust within your email communications, you can tackle phishing threats right at their origin. This solution not only safeguards your brand but also enhances email deliverability and allows for the integration of modern email standards like BIMI, AMP, and Schema.org. Key features include the automatic recognition of outbound sending services and access to a vast database of known sending services. Additionally, it offers detailed insights into the authentication status (SPF, DKIM, and DMARC) for all sending domains and services, with simplified DKIM key detection and configuration, all of which contribute to a formidable defense against email fraud. In an increasingly digital landscape, ensuring the security of your communication channels is paramount for business success.

More than 90% of targeted cyber attacks begin with spear phishing emails, underscoring the urgent requirement for enhanced mail server security. Unfortunately, many current security measures, such as the basic protections found in Microsoft® Exchange™ 2013 and 2016, rely on outdated pattern file updates that mainly detect traditional malware. These approaches often fall short in their ability to identify malicious URLs or document exploits, which are common in sophisticated attacks and advanced persistent threats (APTs). On the other hand, ScanMail™ Suite for Microsoft® Exchange™ takes a proactive stance against highly targeted email threats and spear phishing by utilizing advanced document exploit detection, a superior web reputation system, and sandboxing, all integral to a customized APT defense strategy that competitors do not offer. Additionally, ScanMail stands out by providing the capability to block conventional malware through its advanced email, file, and web reputation technologies, coupled with global threat intelligence gathered from the Trend Micro™ Smart Protection Network™ cloud-based security, thereby delivering extensive protection for your mail server. In this landscape of ever-evolving cyber threats, selecting the appropriate security solution becomes imperative for the safety of your organization, ensuring that it can withstand both current and future challenges effectively.

Material is a dedicated security platform for Google Workspace and Microsoft 365—the critical infrastructure modern organizations run on. Stop attacks, protect sensitive data, and strengthen your security posture with one solution built for modern Security and IT teams. Material streamlines SecOps by unifying detections and automating remediations across your cloud workspace in one platform that gives you unprecedented visibility and control. Material stops sophisticated attacks, secures sensitive data in files and mailboxes, detects and contains account takeovers, and reduces risk across your environment. Your cloud workspace isn’t just another app. It's critical infrastructure - home to your people, content, and communications — and requires dedicated protection. Point solutions and home-grown detections create gaps and drain efficiency. Material replaces the patchwork with one detection and response platform that stitches context together across threats, data, identity, and configuration—so you can get more done with fewer resources.

At EmailAuth.io, which is affiliated with Infosec Ventures, our primary focus is safeguarding your most precious digital asset: your email. We are committed to enhancing your email deliverability, ensuring you receive the highest return on investment from your email campaigns, and fostering trust with your customers, partners, and vendors alike. Our approach goes beyond mere support; we take charge of the entire process! EmailAuth employs a strategy that encompasses the full journey toward achieving the highest level of security for your domains. Our team of security specialists, along with dedicated customer success managers, collaborates seamlessly with you to ensure your needs are met effectively. Together, we work towards a secure and trustworthy email experience for all your communications.

Libraesva Phishing Simulator is a robust security awareness and evaluation tool designed to assist organizations in assessing and bolstering their employees' defenses against phishing threats through practical, controlled simulations. The platform empowers administrators to create and implement tailored phishing campaigns that closely mirror real-life threats, helping to pinpoint vulnerable users and gauge the overall risk exposure of the organization. With a user-friendly management dashboard, it provides comprehensive reports on user interactions, including who opened emails, clicked on malicious links, or submitted sensitive information, which aids in targeted follow-up training efforts. Offering a wide selection of pre-designed phishing templates, the tool also allows organizations to adapt scenarios to fit their specific risk profiles, industry requirements, or internal policies. Moreover, by incorporating features such as automated campaign scheduling, performance analytics, and user risk scoring, this solution enables organizations to develop ongoing security awareness initiatives that evolve with emerging threats. In this way, businesses can enhance their proactive strategies against cyber risks, ultimately leading to a more secure environment for everyone involved. As organizations navigate the complexities of digital security, the simulator proves to be an invaluable resource in maintaining vigilance against phishing attacks.